rename useStrict transformer to strict

src/babel/transformation/file.js

@@ -388,7 +388,7 @@ export default class File {
     var opts = this.opts;
 
     opts.allowImportExportEverywhere = this.isLoose("es6.modules");
-    opts.strictMode = this.transformers.useStrict.canRun();
+    opts.strictMode = this.transformers.strict.canRun();
 
     return parse(opts, code, (tree) => {
       this.transform(tree);

src/babel/transformation/transformers/deprecated.json

@@ -1,4 +1,5 @@
 {
+  "useStrict": "strict",
   "selfContained": "runtime",
   "unicode-regex": "regex.unicode",
 

src/babel/transformation/transformers/index.js

@@ -1,5 +1,5 @@
 export default {
-  useStrict:                               require("./other/use-strict"),
+  strict:                                  require("./other/strict"),
 
   "validation.undeclaredVariableCheck":    require("./validation/undeclared-variable-check"),
   "validation.noForInOfAssignment":        require("./validation/no-for-in-of-assignment"),
@@ -97,7 +97,7 @@ export default {
   "spec.typeofSymbol":                     require("./spec/typeof-symbol"),
   "spec.undefinedToVoid":                  require("./spec/undefined-to-void"),
 
-  _useStrict:                              require("./internal/use-strict"),
+  _strict:                                 require("./internal/strict"),
   _moduleFormatter:                        require("./internal/module-formatter"),
 
   "es3.propertyLiterals":                  require("./es3/property-literals"),

src/babel/transformation/transformers/internal/declarations.js

@@ -1,4 +1,4 @@
-import * as useStrict from "../../helpers/use-strict";
+import * as strict from "../../helpers/use-strict";
 import t from "../../../types";
 
 export var secondPass = true;
@@ -6,7 +6,7 @@ export var secondPass = true;
 export function BlockStatement(node, parent, scope, file) {
   if (!node._declarations) return;
 
-  useStrict.wrap(node, function () {
+  strict.wrap(node, function () {
     var kinds = {};
     var kind;
 

src/babel/transformation/transformers/internal/module-formatter.js

@@ -1,9 +1,9 @@
-import * as useStrict from "../../helpers/use-strict";
+import * as strict from "../../helpers/strict";
 
 export function Program(program, parent, scope, file) {
   if (!file.transformers["es6.modules"].canRun()) return;
 
-  useStrict.wrap(program, function () {
+  strict.wrap(program, function () {
     program.body = file.dynamicImports.concat(program.body);
   });
 

src/babel/transformation/transformers/internal/strict.js

@@ -1,7 +1,7 @@
 import t from "../../../types";
 
 export function Program(program, parent, scope, file) {
-  if (file.transformers.useStrict.canRun()) {
+  if (file.transformers.strict.canRun()) {
     program.body.unshift(t.expressionStatement(t.literal("use strict")));
   }
 }